Portable car seat

ABSTRACT

The present invention relates to a portable car seat comprising: a seat part on which a child sits; a backrest part rotatably coupled to the seat part; a rotation connection part for rotating the seat part and the backrest part; and a rotation prevention part for restricting rotation, performed by the rotation connection part, through a stopper for preventing rotation.

TECHNICAL FIELD

The present invention relates to a portable car seat.

BACKGROUND ART

Generally, various vehicles, such as a passenger vehicle, are drivenwhile a seat belt is fastened for passenger's safety. However, sincemost seat belts and safety devices attached to a vehicle are installedbased on an adult, there is a problem in that an infant or childaccompanying a driver may be injured when a car accident occurs due to arear end vehicle collision, car crashes, or the like.

Because it is difficult for the infant or child who is relativelysmaller than an adult to fasten a seat belt, they are easily exposed toa great danger, and when the seat belt is used for an infant or childanyway, since the seat belt is not designed to fit a body size of theinfant or child, an abdomen or neck portion (corresponding to a positionof the seat belt) of the infant or child may be injured.

Recently, to solve such problems, a separate infant protective seat,called an infant car seat, is mounted on a seat of a vehicle, and avehicle is driven while an infant sits on the infant car seat.

The main function of the infant car seat is to maximally absorb anddisperse an impact generated in vehicle collision before the impact istransmitted to an infant in the car. A lifesaving effect of the infantcar seat is certain. The percentage of cases of serious injury or deathis less than 40% when the infant car seat is used as opposed to when itis not, the ratio of casualties who use infant car seat is less than ⅓of all the casualties, and the percentage of serious injuries or deathout of the casualties who use infant car seat reaches 1.17%. Accordingto national laws for the safety of infant or child, such as the RoadTraffic Law, it is necessary to mount an infant protective device to avehicle when an infant or child is accompanying, but the law is notfollowed well in practice.

Since a device that helps an infant safely ride a current vehicle is notmounted on the vehicle, there is an inconvenience in that a separateinfant car seat should be directly purchased and mounted on the vehicle.Further, since the infant car seat is inconvenient to carry due to thelarge weight and size thereof, in many cases, a driver does not mountand use the infant car seat even when the infant car seat has beenpurchased.

Therefore, much research and development has been done to increase useof the infant car seat so as to secure the safety of an infant or childand protect a life of an infant or child, and also to increase safety ofthe infant car seat.

DISCLOSURE Technical Problem

The present invention is directed to providing a portable car seat whichsecures safety of an infant in a vehicle and facilitates portability.

Technical Solution

One aspect of the present invention provides a portable car seatincluding a seat part on which an infant sits and which is mounted on acar seat, a backrest part rotatably coupled to one side of the seatpart, a rotation connection part configured to rotatably connect theseat part to the backrest part, and a rotation prevention partconfigured to restrict relative rotation of the backrest part and theseat part which occurs due to the rotation connection part, wherein therotation prevention part includes a stopper provided on the backrestpart to prevent rotation toward a space in which the infant sits.

The backrest part may include a first backrest frame which is in directcontact with the infant and has a rotation preventing point which is incontact with the car seat, and a second backrest frame connected withthe first backrest frame to be spaced apart a predetermined distance andhaving an axis of rotation, wherein the stopper may be configured toprevent the seat part and the backrest part from being folded by therotation connection part toward a space in which the infant sits, andthe rotation preventing point may prevent additional rotation.

The rotation preventing point may be formed to be spaced apart from therotation origin a predetermined distance forward, the stopper may beformed above the rotation preventing point, the rotation preventingpoint may primarily prevent rotation, and the stopper may secondarilyprevent rotation.

The rotation connection part may be provided under the second backrestframe, and the stopper may be provided under the first backrest frameconnected with the second backrest frame to be spaced apart apredetermined distance and may prevent the seat part and the backrestpart from being folded toward a space in which the infant sits due tothe rotation connection part.

The rotation preventing part may restrict an angle from the secondbackrest frame to the seat part in a counterclockwise direction frombeing less than or equal to 90° and may allow the seat part to rotateabout the second backrest frame in a counterclockwise direction by anangle greater than 90° and less than 360°.

The portable car seat may further include a headrest part configured toprotect a head of the infant from the car seat which is connected to anupper side of the backrest part, wherein the headrest part may berotatably connected to the backrest part.

The headrest part may be connected to the backrest part to be foldedtoward a space in which the infant sits.

The headrest part may be connected to the backrest part by a Velcro-typemember on a side opposite to the space in which the infant sits.

The headrest part may include a front supporting part configured tosupport the back of a head of the infant, a left supporting partconfigured to support the left of the head of the infant, and a rightsupporting part configured to support the right of the head of theinfant, wherein the left supporting part or the right supporting partmay be adjustable on the front supporting part to surround the head ofthe infant.

The left supporting part or the right supporting part may be bendable tobe inclined toward the head of the infant from the front supportingpart.

The belt for fastening the infant to the backrest part or the seat partmay be mounted on the backrest part rather than the car seat.

Advantageous Effects

The portable car seat according to the present invention can increaseportability of the car seat by being formed as a foldable type and canpractically secure safety of an infant by increasing a rate of mountingthe car seat in a vehicle.

Further, the portable car seat according to the present invention canremarkably increase safety functions of the portable car seat byaccommodating a mechanical structure of the car seat to be supported ona vehicle seat to reduce rotational momentum of the portable car seatdespite a foldable configuration which increases portability.

DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a portable car seat according to oneembodiment of the present invention.

FIG. 2 is an operational perspective view of the portable car seataccording to one embodiment of the present invention.

FIG. 3 is a side view of a frame of the portable car seat according toone embodiment of the present invention.

FIG. 4 is a plan view of the frame of the portable car seat according toone embodiment of the present invention.

FIG. 5 is a front view of the frame of the portable car seat accordingto one embodiment of the present invention.

FIG. 6 is a rear view of the frame of the portable car seat according toone embodiment of the present invention.

FIG. 7 is an operational perspective view of the frame of the portablecar seat according to one embodiment of the present invention.

FIG. 8 is an operational side view of the frame of the portable car seataccording to one embodiment of the present invention.

FIG. 9 is a perspective view showing an infant sitting on the portablecar seat according to one embodiment of the present invention.

MODES OF THE INVENTION

Purposes, specific advantages, and novel features of the presentinvention will be made clear from exemplary embodiments and thefollowing detailed descriptions in connection with the accompanyingdrawings. In this specification, it should be noted that the samereference numerals may be assigned to the same components in differentdrawings whenever possible. When detailed descriptions of relatedwell-known technology are deemed to unnecessarily obscure the gist ofthe present invention in the descriptions of the present invention, theywill be omitted.

Hereinafter, various embodiments of the present invention will bedescribed in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a portable car seat according to oneembodiment of the present invention, FIG. 2 is an operationalperspective view of the portable car seat according to one embodiment ofthe present invention, FIG. 3 is a side view of a frame of the portablecar seat according to one embodiment of the present invention, FIG. 4 isa plan view of the frame of the portable car seat according to oneembodiment of the present invention, FIG. 5 is a front view of the frameof the portable car seat according to one embodiment of the presentinvention, FIG. 6 is a rear view of the frame of the portable car seataccording to one embodiment of the present invention, FIG. 7 is anoperational perspective view of the frame of the portable car seataccording to one embodiment of the present invention, FIG. 8 is anoperational side view of the frame of the portable car seat according toone embodiment of the present invention, and FIG. 9 is a perspectiveview showing an infant siting on the portable car seat according to oneembodiment of the present invention.

As shown in FIGS. 1 to 9, a portable car seat 1 according to oneembodiment of the present invention includes a headrest part 10, abackrest part 20, a seat part 30, a rotation connection part 60, and arotation prevention part 70.

Hereinafter, the configurations will be described in detail withreference to FIGS. 1 to 9.

The headrest part 10 is positioned above the backrest part 20 and formedat a portion which is in contact with back of a head (not numbered) tosupport the head when an infant I sits on the seat part 30, thuseffectively protecting the head of the infant I. The headrest part 10 ismounted on the headrest part (not numbered) of a car seat S when theportable car seat 1 is installed in a vehicle (not shown).

Specifically, the headrest part 10 is connected to an upper side of thebackrest part 20 to be in direct contact with the back of the head ofthe infant I. A frame (not shown) is formed in the headrest part 10 tosupport the back of the head, and a cushion filled with an elasticmaterial, such as cotton, sponge, spring, or the like, is formed toeffectively protect the back of the head. An exterior of the headrestpart 10 is formed as a cover to cover an interior of the headrest part10 so as to protect the interior from external contaminants and toprovide a soft surface for the cover when the infant I is pressedagainst the cover.

Further, the headrest part 10 includes a headrest body part 11 and afirst Velcro-connection part 12 which may be connected to the backrestpart 20 to be folded forward. The forward-folding means that theheadrest part 10 is folded toward a space in which the back of the headof the infant is positioned.

The headrest body part 11 may be connected to be bendable so that alower end of a front surface (not numbered), which is a surface facingthe back of the head of the infant I, is folded forward onto an upperend of the backrest part 20, and the first Velcro-connection part 12described below is provided on a rear surface (not numbered) of theheadrest body part 11 and is attached to or detached from a secondVelcro-connection part 26 provided at an upper end of the backrest part20.

The first Velcro-connection part 12 is provided on the rear surface ofthe headrest body part 11, protrudes downward at least partially, andmay extend to face the second Velcro-connection part 26 provided on thebackrest part 20.

The first Velcro-connection part 12 may be made of cotton, fabric,fiber, or the like, have one side fixed-connected with the headrest bodypart 11 and the other side on which many protrusions, such as fine hooksor the like, are integrally formed, and may be connected to be attachedby coming in contact with the hook formed on the secondVelcro-connection part 26 in a loop shape or to be detached form thehook.

Folding by a forward rotation of the headrest part 10 will be describedin detail with reference to FIGS. 1 and 2.

FIG. 1 is a perspective view of a portable car seat according to oneembodiment of the present invention, and FIG. 2 is an operationalperspective view of the portable car seat according to one embodiment ofthe present invention.

In FIG. 1, the headrest part 10 is positioned above the backrest part 20to be upright in series. In this case, the first Velcro-connection part12 is connected with the second Velcro-connection part 26 to prevent theheadrest part 10 from rotating forward and is fixed to the backrest part20.

When the first Velcro-connection part 12 is disconnected from the secondVelcro-connection part 26, the headrest part 10 rotates forward withrespect to a portion bendably connected to the backrest part 20 as acenter of rotation. As shown in FIG. 2, the headrest part 10 ispositioned in front of the backrest part 20.

In the structure, since one side of the headrest part 10 bendablyconnected to the backrest part 20 is attached to or detached from thebackrest part 20 by the first Velcro-connection part 12, the headrestpart 10 is folded by rotating forward (see FIG. 2) when the firstVelcro-connection part 12 is detached from the second Velcro-connectionpart 26, and thus the portable car seat 1 of the present invention canbe easily carried. When the first Velcro-connection part 12 is attachedto the second Velcro-connection part 26, the headrest part 10 is fixedto the backrest part 20 (see FIG. 1), and thus the back of the head ofthe infant (I) can be effectively protected.

Therefore, in the portable car seat 1 according to one embodiment of thepresent invention, the headrest part 10 is foldably formed to increasethe portability of the portable car seat 1, and a rate of mounting theportable car seat 1 in the vehicle (not shown) is increased, and thussafety of the infant I may be practically secured.

Further, the headrest body part 11 includes a front supporting part 111supporting back of the head of the infant I on a front side thereof, aright supporting part 112 supporting a right side of the head of theinfant I, and a left supporting part 113 supporting a left side of thehead of the infant I, and the right supporting part 112 or the leftsupporting part 113 may be adjusted according to a size of the head ofthe infant I.

The front supporting part 111 has a frame formed therein to be incontact with the back of the head of the infant I on a front sidethereof to support the back of the head of the infant I and may beconnected with the right supporting part 112 and the left supportingpart 113 on the right and left of the headrest body part 11,respectively.

Each of the right supporting part 112 and the left supporting part 113includes an aluminum plate formed therein to be bent and is adjustableto be inclined toward a head of the infant I from the front supportingpart 111.

In the headrest body part 11, the right and left supporting part 112 and113 are adjusted according to the size of the head of the infant I toenhance protection of the head of the infant and improve comfort.

The backrest part 20 is positioned above the seat part 30 and under theheadrest part 10 to be in contact with a backbone part (back; notnumbered) of the infant I so as to support the back of the infant I whenthe infant I sits on the seat part 30, and thus generally supports theinfant I on the portable car seat 1. The backrest part 20 is mounted onthe backrest part (not numbered) of the car seat S when the portable carseat 1 is mounted on the vehicle.

Particularly, the backrest part 20 is connected to a lower side of theheadrest part 10 and an upper side of the seat part 30 to be in contactwith the backbone part of the infant I.

The backrest part 20 includes a first backrest frame 21, which is incontact with the backbone part and supports the backbone part, and asecond backrest frame 22 which vertically supports the backbone partwhen the portable car seat 1 is mounted on the car seat S. The firstbackrest frame 21 effectively supports the backbone part of the infantI, and the second backrest frame 22 allows the infant I to be generallysupported on the car seat S, and a cushion, filled with an elasticmaterial, such as cotton, sponge, spring, or the like, may be formedbetween the first backrest frame 21 and the second backrest frame 22.

An exterior of the backrest part 20 is formed as a cover to cover aninterior thereof so as to protect the interior from externalcontaminants and allow other components to be easily connected with eachother.

The first backrest frame 21 has a U-shape and has an upper portionpartially bent rearward to be connected with the second backrest frame22, a middle portion connected with the second backrest frame 22 by afirst frame connection part 231 to be spaced apart a predetermineddistance, and a lower portion connected with the second backrest frame22 by a second frame connection part 232 to be spaced apart therefrom bya predetermined distance.

In this case, seat belt fixing buckles 24 may be firmly coupled to bothsides of the front side of the middle portion of the first backrestframe 21 by welding and the like and may be coupled to both sides of themiddle portion of the first backrest frame 21. The seat belt fixingbuckle 24 is connected to a seat belt (not shown) provided on the carseat S, and the portable car seat 1 may be mounted on the car seat S.

The first backrest frame 21 includes a first backrest reinforced frame251 and a second backrest reinforced frame 252 formed in a lateraldirection so as to reinforce a tolerance to an external force, and thusa backbone part supporting force and protecting force of the infant Ican be increased.

The rotation prevention part 70 is provided under the first backrestframe 21, and the first backrest frame 21 includes a rotation preventingpoint P2, which is in direct contact with the car seat S, and thus theseat part 30 and the rotation prevention part 70 may doubly restrictrotation in a direction in which a space, on which the infant I sits, isfolded. This will be described below in detail in a description of therotation prevention part 70.

The second backrest frame 22 has a U-shape and has an upper portionpartially coupled to the first backrest frame 21 by welding and themiddle portion and a lower portion connected with the first backrestframe 21 by the first frame connection part 231 and the second frameconnection part 232 to be spaced apart a predetermined distance. Therotation connection part 60 is provided below the second backrest frame22, which will be described below in detail in a description of therotation connection part 60.

An upper portion of a front surface of the backrest part 20 may bebendably connected to the headrest part 10 (preferably, connected by anelastic band formed at an external cover), and a secondVelcro-connection part 26 is provided at an upper side of a rear surfaceof the backrest part 20 to be attached to or detached from the firstVelcro-connection part 12 provided at the headrest part 10, and thus theheadrest part 10 may be fixed or folded forward.

Further, the backrest part 20 may be rotatably connected with the seatpart 30 by the rotation connection part 60 formed under the secondbackrest frame 22, and the rotation prevention part 70 formed on thefirst backrest frame 21 may restrict rotation of the seat part 30.

This will be described below in detail in descriptions of the rotationconnection part 60 and the rotation prevention part 70.

The seat part 30, which is a portion on which the infant I sits, ispositioned under the backrest part 20 to face a hip part (not numbered)of the infant I, and is mounted on the seat part (not numbered) of thecar seat S when the portable car seat 1 is mounted in the vehicle.

Specifically, the seat part 30 is perpendicularly connected to a lowerportion of the backrest part 20 to directly face the hip part of theinfant I.

The seat part 30 includes a seat frame 31 formed in a U-shape therein tosupport a hip part and includes a cushion filled with an elasticmaterial, such as cotton, sponge, spring, or the like, to effectivelyprotect the hip part and improve comfort.

The exterior of the seat part 30 is formed as a cover to cover theinterior thereof so as to protect the interior from externalcontaminants and to provide a soft feel.

Further, since one side of the seat frame 31 is connected to therotation connection part 60 formed at a lower portion of the secondbackrest frame 22, the seat part 30 is rotatably connected to thebackrest part 20, and the rotation prevention part 70 formed to bespaced apart from one side of the seat frame 31 formed on the firstbackrest frame 21 may restrict rotation of the seat part 30.

This will be described below in detail in descriptions of the rotationconnection part 60 and the rotation prevention part 70.

A backrest-cushion part 40 is connected to a front surface of thebackrest part 20 to be in direct contact with the backbone part of theinfant I, is filled with an elastic material, such as cotton or thelike, to improve comfort when the infant I sits on the seat, andincludes a left cover cushion 41 and a right cover cushion 42 formed atleft and right sides thereof so that the infant I is pressed against theportable car seat 1 so as to easily protect the infant I.

The backrest-cushion part 40 includes a left shoulder belt cushion part51 and a right shoulder belt cushion part 52 formed at a front surfacethereof, which is in contact with the backbone part of the infant I, anda left buckle 521 and a right buckle 511 on belts B provided at the leftand right shoulder belt cushion parts 51 and 52 are coupled to a fixingbuckle 531 on the belt B provided on a belt fixing cushion part 53,which is provided on the seat part 30, and thus the infant I may sit onthe portable car seat 1 with the belt over the shoulder.

The portable car seat 1 according to one embodiment of the presentinvention allows the infant I to be indirectly fixed to a vehicle by thebelt B provided on the portable car seat 1 rather than by a seat belt ofthe vehicle.

The left and right buckles 511 and 521 and a fixing buckle 531 areslidably provided on the belts B. In the embodiment, the belts B areformed in a three point-harness belt-type but this is just an example,and a two-point belt type may be used.

The rotation connection part 60 is rotatably connected to the backrestpart 20 and the seat part 30. Specifically, the rotation connection part60 includes a rotation frame 62 fixed to a lower end of the secondbackrest frame 22 in a lateral direction and a rotation coupling unit 61rotatably provided on the rotation frame 62 and connected to an end ofthe seat frame 31 of the seat part 30.

The rotation frame 62 serves as a rotating shaft allowing the backrestpart 20 and the seat part 30 to rotate.

A rotation origin P1 is formed at a portion of the second backrest frame22 connected with the rotation frame 62 to allow the backrest part 20and the seat part 30 to rotate in a clockwise direction orcounterclockwise direction.

An operation in which the backrest part 20 and the seat part 30relatively rotate using the rotation connection part 60 will bedescribed in detail with reference with FIGS. 7 and 8.

FIG. 7 is an operational perspective view of the frame of the portablecar seat according to one embodiment of the present invention, and FIG.8 is an operational side view of the frame of the portable car seataccording to one embodiment of the present invention.

Referring to FIGS. 7A and 8A, shown on the left side of the FIGS. 7 and8, when the portable car seat 1 is disposed on the car seat S so thatthe infant I sits in the vehicle, the backrest part 20 and the seat part30 are perpendicularly connected with each other to be disposed in achair form on which the infant I sits.

When the portable car seat 1 is removed from the car seat S, arotational momentum generated when a force is applied to a seat partsupporting point P3 of the seat part 30 allows the seat part 30 tomaximally rotate in a counterclockwise direction with respect to therotation origin P1 as an axis of rotation, after which the seat part 30is disposed to face a rear surface of the backrest part 20 as shown inFIGS. 7B and 8B shown on the right side of the FIGS. 7 and 8.

In the portable car seat 1 according to the present invention, thebackrest part 20 and the seat part 30 are folded by the rotationconnection part 60, and thus portability can be increased.

Since a convention car seat does not rotate, the backrest part 20 andthe seat part 30 are perpendicularly connected with each other, and thecar seat is not easily carried due to occupying a great deal of space,and thus there is a problem in that the rate of mounting a car seat in avehicle is very low.

In the embodiment of the present invention, the portable car seat 1 issimultaneously folded rearward by the rotation connection part 60 whilethe above-described headrest part 10 is folded forward, and a spaceoccupied by the portable car seat 1 when the portable car seat 1 iscarried is remarkably reduced, and thus the car seat 1 can be easily andpractically carried. Thus, the rate of mounting the portable car seat 1in the vehicle is increased, and safety of the infant I may bepractically secured.

The rotation prevention part 70 stops the relative rotation of thebackrest part 20 and the seat part 30 by the rotation connection part60. Specifically, the rotation prevention part 70 includes a stopper 71fixedly installed at a lower end of the first backrest frame 21 in alateral direction, and a stopper facing part 72 fixedly installed in alateral direction at a position facing the stopper 71 when the seat part30 rotates to a position spaced apart from a portion, at which the seatpart 30 is connected with the rotation coupling unit 61, by apredetermined distance.

The stopper 71 comes into contact with the stopper facing part 72 whenthe seat part 30 rotates in a clockwise direction so as to restrictrotation of the seat part 30. Preferably, the stopper 71 restrictsrotation in a direction in which a space, in which the infant I sits, isfolded.

In the portable car seat 1 of the present invention, the rotationpreventing point P2, which is in direct contact with the car seat S, isprovided on the first backrest frame 21 and can effectively restrictrotation in a direction in which a space, in which the infant I sits, isfolded doubly along with the rotation prevention part 70.

The rotation preventing point P2 is formed to be spaced apart from therotation origin P1 and formed at a lower end of the second backrestframe 22, a predetermined distance forward so as to restrict rotation ina direction in which the backrest part 20 is folded to a space in whichthe infant I sits.

The stopper 71 is positioned above the rotation preventing point P2 soas to primarily reduce a relative rotation force of the backrest part 20and the seat part 30 due to the rotation preventing point P2, is incontact with the stopper facing part 72 so as to secondarily reduce arotation force of the seat part 30, and completely offsets a rotationforce of the backrest part 20 and the seat part 30.

Referring to FIGS. 7 and 9, an operation in which the rotationprevention part 70 restricts rotation of the backrest part 20 and theseat part 30 will be described in detail.

FIG. 7 is an operational perspective view of the frame of the portablecar seat according to one embodiment of the present invention, and FIG.9 is a perspective view showing an infant sitting on the portable carseat according to one embodiment of the present invention.

Referring to FIG. 7A, shown on the left of FIG. 7, the backrest part 20and the seat part 30 of the portable car seat 1 are perpendicularlydisposed. In this case, the stopper 71 provided in the first backrestframe 21 of the backrest part 20 is in contact with the stopper facingpart 72 of the seat part 30 so as to restrict the seat part 30 fromrotating toward a space of the portable car seat 1 in which the infant Isits. That is, the rotation prevention part 70 prevents an angle fromthe seat part 30 to the second backrest frame 22 in a clockwisedirection from being less than or equal to 90°.

Therefore, the seat part 30 may be rotated about the backrest part 20 bythe rotation prevention part 70 by an angle greater than 90° and lessthan 360°, and may be rotated about the second backrest frame 22 by anangle greater than 0° and less than 270° in a clockwise direction orcounterclockwise direction.

Referring to FIG. 9, when the infant I leans forward after sitting onthe portable car seat 1 and being fastened in with the belt B, the beltB holds the infant I to the backrest part 20 and the seat part 30 so asto generate rotational momentum that rotates the backrest part 20 andthe seat part 30 toward a space in which the infant I sits.

The rotational momentum is easily generated when the vehicle quicklystarts and brakes, and when the portable car seat 1 is formed as afoldable type, the backrest part 20 and the seat part 30 areautomatically folded toward the space in which the infant I sits byforward leaning, which may be a threat to safety of the infant I.

To solve the problem, as described above, when the momentum of foldingthe seat part 30 toward a space, in which the infant I sits, byforward-leaning is generated, the portable car seat 1 of the presentinvention allows the rotation preventing point P2 to primarily remove arotational momentum of the backrest part 20, and the rotation preventionpart 70 secondarily offsets a rotation momentum of the seat part 30 byallowing the stopper 71 and the stopper facing part 72 to come intocontact with each other so as to doubly prevent folding of the seat part30, and thus a safety function of the portable car seat 1 is remarkablyincreased.

The present invention has been described in detail with reference to theexemplary embodiments. However, the exemplary embodiments should beconsidered in a descriptive sense only, and the present invention is notlimited thereto. It should be clear to those skilled in the art thatvarious modifications and improvements within the scope of the presentinvention may be made.

Simple modifications and alterations of the present invention fallwithin the scope of the present invention, and the scope of the presentinvention is defined by the accompanying claims.

The invention claimed is:
 1. A portable car seat comprises: a seat partconfigured to have a child sit thereon, and which is configured to bemounted on a car seat; a backrest part connected to the seat part andconfigured to face a back of the child sitting on the seat part; arotation part configured to rotatably connect the seat part to thebackrest part; and a harness belt configured to hold the child sittingon the portable car seat to the backrest part and the seat part, whereinthe seat part rotates about the backrest part and switches between aportable state in which the seat part is disposed to face a rear surfaceof the backrest part and a seating state in which the seat part isinclined toward a front surface of the backrest part and disposed to bein a chair form, wherein the backrest part includes: a backrest frame;and a reinforced frame formed in a width direction on the backrestframe, and wherein seat belt fixing buckles are coupled to both sides,in a width direction, of a front side of the backrest frame to fix aseat belt provided on a vehicle so that the backrest part is mounted onthe car seat.
 2. The portable car seat of claim 1, wherein the backrestframe includes: a rotation origin formed at a back side of a lower endthereof to allow the seat part to rotate, a rotation preventing pointformed at the front side of the lower end thereof and being in contactwith the car seat to prevent the backrest part from rotating toward aspace in which the child sits, and wherein the rotation preventing pointis positioned ahead of the rotation origin.
 3. The portable car seat ofclaim 2, further comprising a backrest-cushion part connected to thefront surface of the backrest part.
 4. The portable car seat of claim 2,wherein the seat part includes: a seat frame; and a cover covering theseat frame.
 5. The portable car seat of claim 2, wherein the rotationpart includes: a rotation connection part rotating the seat part withrespect to the backrest part; and a rotation prevention part restrictingrotation of the seat part with respect to the backrest part.
 6. Theportable car seat of claim 5, wherein the rotation connection partincludes: a rotation frame provided in the width direction at the lowerend of the backrest frame and serving as a rotating shaft allowing theseat part to rotate; and a rotation coupling unit rotatably provided onthe rotation frame and connected to an end of the seat part.
 7. Theportable car seat of claim 5, wherein the rotation prevention partincludes: a stopper provided in the width direction at the lower end ofthe backrest frame; and a stopper facing part provided in the widthdirection at a position facing the stopper when the seat part rotates,and preventing rotation of the seat part toward a space in which thechild sits.
 8. The portable car seat of claim 1, wherein the harnessbelt includes a shoulder cushion part and a fixing buckle and allows thechild to be indirectly fixed to the vehicle.
 9. The portable car seat ofclaim 1, further comprising a headrest part positioned at an upper sideof the backrest part to support a head of the child.
 10. The portablecar seat of claim 9, wherein the headrest part includes: a headrestframe; and a cover covering the headrest frame.
 11. The portable carseat of claim 9, wherein the headrest part is provided to support back,left and right sides of the head of the child sitting on the seat part.